03311
Specimen Preference
2020-01-06
Definition: This field indicates whether the Specimen/Attribute is Preferred or alternate for collection of the specimen. There can only be one occurrence of a Preferred or Alternate Specimen/Attribute for the code referenced in OM4-6 Specimen. For example, if two OM4 segments are received for specimen type of Serum, only one can be marked as Preferred. Refer to HL7 Table 0920 – Preferred Specimen/Attribute Status in Chapter 2C, Code Tables, for suggested values.
LengthNot specified
2 values
A | Alternate(This is a specimen that is acceptable as a replacement for a preferred specimen. In the following field (OM4-17), the sequence number of the preferred specimen must be messaged.) |
P | Preferred(This specimen is Preferred for all attributes (Container and Additive) identified in the OM4 segment.) |